Hi Akash The UAS does respond to INVITE with Supported: timer, with a 4xx if the interval is too short or responds with a 2xx. Why do you think there should be an early update? u mean a 1xx response?
On Fri, Dec 4, 2020 at 12:05 PM akashdeep vishnoi <akashanshu...@gmail.com> wrote: > In initial Invite request, UAC is sending a Session-Expires header. After > receiving this request, UAS will know that session timer negotiation is > ongoing. > Can UAS send an early update with a different value in Session-Expires? > > Thanks, > Aakash > > On Fri, 4 Dec 2020, 22:40 Ranjit Avasarala, <ranjitka...@gmail.com> wrote: > >> Hi Aakash >> >> how will UAC or UAS know if another negotiation for session timer is >> ongoing? do u mean multiple INVITEs are sent from UAC? >> >> Regards >> Ranjit >> >> On Fri, Dec 4, 2020 at 11:01 AM akashdeep vishnoi < >> akashanshu...@gmail.com> wrote: >> >>> Hi, >>> >>> I have a little confusion in this : >>> -------------------------------- >>> Errata ID: 4744 >>> Status: Reported >>> Type: Technical >>> Publication Format(s) : TEXT >>> Reported By: Chao Wang >>> Date Reported: 2016-07-19 >>> >>> Section 3 says: >>> A UAC starts by sending an INVITE. This includes a Supported header >>> field >>> with the option tag 'timer', indicating support for this extension >>> >>> It should say: >>> A UAC starts by sending an INVITE. This includes a Supported header field >>> with the option tag 'timer', indicating support for this extension.If UAC >>> or UAS knows one negotiation of session timer is ongoing, it SHALL not >>> start a new one. >>> >>> >>> >>> ------------------------------------------------------------------------------- >>> As per above explanation, I want to know if* Session Expire timer value >>> can >>> be changed by UAS/UAC by sending early UPDATE* before Call is established >>> when INVITE request already has one timer value. >>> >>> Thanks, >>> Aakash >>> _______________________________________________ >>> Sip-implementors mailing list >>> Sip-implementors@lists.cs.columbia.edu >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >>> >> _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
